I had the same problem, where limewire starts to open as usual (the window shows up saying 'loading library...etc.' and then nothing. at the same time i had a problem with one of my folders where my computer would get the windows error msg every time i click on that folder...i narrowed it down to the specific folder "incomplete" that is automatically made with limewire... so i just renamed that "incomplete" folder to somethin random and then deleted it!... my limewire worked just fine after that... also LW just makes another folder called 'incomplete' after u delete the 'corrupted' one so it's ok.. i guess. well try that and see if it works... it did for me.
let me know how it turns out... good luck